| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [verb] a | 8988 |
|
| 2 | could [adv] [verb] [art] | 4691 |
|
| 3 | could [adv] [verb] [art] | 4691 |
|
| 4 | could [adv] [verb] a | 1664 |
|
